Question

Is there a way for an iterator to return an object in each element of a C++ Standard Library vector?

I have this code:

struct mystruct {
  int field1;
}

int DoSomethingWithMyStruct(mystruct& a);

std::vector<mystruct> myVector;
std::vector<mystruct>::iterator it;

mystruct s1,s2, temp;
s1.field1=1;
s2.field1=2;

for (it=myVector.begin();it!=myVector.end();it++)
{
   //I want to call DoSomethingWithMyStruct, so I have to pass in mystruct object.
   //can I use iterator to get the object of each element in myVector without having to create a temporary mystruct object and pass it in?
   //I'm looking for an easier way than having to do this:
   temp.field1 = it->field1;
   DoSomethingWithMyStruct(temp);

}

Answer 1

As well as what the others said, you can do this instead:

#include <algorithm>

std::for_each(myVector.begin(), myVector.end(), DoSomethingWithMyStruct);

It’s short and succinct. No need of manual loop.